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Number Skills Practice Worksheet

Quantitative aptitude lesson 10: Practice: number skills · Set 905 · 40 questions
TalentJR

The method (Spot the type): Read the question and name the topic: HCF/LCM, fraction, ratio, percent … Use that lesson’s method and write each step. Check: is the answer sensible in size and units?

NameDateTime takenScore ___ / 40
  1. 1.Find the third proportional to 6 and 18 (that is, 6 : 18 = 18 : ?).
  2. 2.84 ÷ 7 × 9 + 18 =
  3. 3.Find the LCM of 5 and 2.
  4. 4.10 : 8 = 40 : ?
  5. 5.What is 30% of 170?
  6. 6.Write 1/4 as a percent.
  7. 7.What is 1/2 of ₹60?
  8. 8.Find the LCM of 14, 6 and 4.
  9. 9.Round 24.43 to one decimal place. =
  10. 10.Which is closest to 1495 ÷ 49? (a) 300 (b) 60 (c) 15 (d) 30
  11. 11.30% of a number is 99. What is the number?
  12. 12.10 : 2 = 20 : ?
  13. 13.20 + 6 × 12 − 19 =
  14. 14.1/3 of 6 + 8 × 8 =
  15. 15.What is the smallest number you must add to 230 so that it divides exactly by 3?
  16. 16.How many factors does 15 have?
  17. 17.Round 43079 to the nearest ten.
  18. 18.The ratio of boys to girls in a class is 6 : 1. There are 24 boys. How many girls are there?
  19. 19.Find the HCF of 20 and 8.
  20. 20.34 + 5 × 3 − 3 =
  21. 21.62 − 42 ÷ 7 × 5 =
  22. 22.25 + 2 × 2 − 2 =
  23. 23.A hall floor is 80 cm long and 60 cm wide. It is covered with the largest square tiles that fit exactly. How many tiles are needed?
  24. 24.Find the LCM of 8, 9 and 12.
  25. 25.The HCF of two numbers is 3 and their LCM is 45. One of the numbers is 9. What is the other number?
  26. 26.Which of these numbers divides exactly by 3? (a) 6675 (b) 7393 (c) 2035 (d) 7445
  27. 27.Three temple bells ring every 6, 30 and 12 minutes. They ring together at 9:00 am. After how many minutes will they next ring together?
  28. 28.Which is closest to 502 × 80? (Round each number first.) (a) 80000 (b) 40000 (c) 4000 (d) 400000
  29. 29.How many factors does 99 have?
  30. 30.12% of a number is 30. What is the number?
  31. 31.Find the LCM of 13, 4 and 3.
  32. 32.Find the HCF of 20 and 15.
  33. 33.Karan takes 40 seconds and Aarav takes 30 seconds to run once round a track. They start together from the start line. After how many seconds will they first be at the start line together again?
  34. 34.Ananya takes 30 seconds and Kabir takes 45 seconds to run once round a track. They start together from the start line. After how many seconds will they first be at the start line together again?
  35. 35.What is the smallest number you must take away from 817 so that it divides exactly by 7?
  36. 36.What is the smallest number you must add to 157 so that it divides exactly by 12?
  37. 37.Which is closest to 499 + 503 + 303? (a) 1300 (b) 1400 (c) 1200 (d) 1500
  38. 38.12 + 11 × 11 − 10 =
  39. 39.Find the LCM of 3 and 7.
  40. 40.24 ÷ 2 × 4 + 4 =

Answer key

  1. 54
  2. 126
  3. 10
  4. 32
  5. 51
  6. 25
  7. 30
  8. 84
  9. 24.4
  10. 30
  11. 330
  12. 4
  13. 73
  14. 66
  15. 1
  16. 4
  17. 43080
  18. 4
  19. 4
  20. 46
  21. 32
  22. 27
  23. 12
  24. 72
  25. 15
  26. 6675
  27. 60
  28. 40000
  29. 6
  30. 250
  31. 156
  32. 5
  33. 120
  34. 90
  35. 5
  36. 11
  37. 1300
  38. 123
  39. 21
  40. 52

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